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Finding the Fourth Proportional to 253,852.47, 380,778.71 and 129,280.95

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Solution

The fourth proportional to 253,852.47, 380,778.71 and 129,280.95 is: 193,921.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,852.47 : 380,778.71 = 129,280.95 : x
  2. Step 2: Convert to fraction form
    253,852.47/380,778.71 = 129,280.95/x
  3. Step 3: Cross multiply
    253,852.47x = 380,778.71 × 129,280.95
  4. Step 4: Simplify right side
    253,852.47x = 49,227,432,722.17
  5. Step 5: Solve for x
    x = 49,227,432,722.17/253,852.47
  6. Step 6: Final answer
    x = 193,921.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.